doc: Improve wording in relocatable-maint.texi.

[gnulib.git] / doc / posix-functions / putc.texi

diff --git a/doc/posix-functions/putc.texi b/doc/posix-functions/putc.texi
index 25a3f94..5562f35 100644 (file)
--- a/doc/posix-functions/putc.texi
+++ b/doc/posix-functions/putc.texi
@@ -2,16 +2,25 @@
 @section @code{putc}
 @findex putc
 
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/putc.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putc.html}
 
-Gnulib module: stdio, sigpipe
+Gnulib module: stdio, nonblocking, sigpipe
 
-Portability problems fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{nonblocking}:
+@itemize
+@item
+When writing to a non-blocking pipe whose buffer is full, this function fails
+with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
+platforms:
+mingw, MSVC 9.
+@end itemize
+
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}:
 @itemize
 @item
 When writing to a pipe with no readers, this function fails, instead of
 obeying the current @code{SIGPIPE} handler, on some platforms:
-mingw.
+mingw, MSVC 9.
 @end itemize
 
 Portability problems not fixed by Gnulib:
@@ -19,4 +28,8 @@ Portability problems not fixed by Gnulib:
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+On some platforms, this function does not set @code{errno} or the
+stream error indicator on attempts to write to a read-only stream:
+Cygwin 1.7.9.
 @end itemize